Dyestuffs capable of being diazotized and process of making same



RNOL SGHEDLER, or MANCHESTER, ENGLAND, ASSIGNOR To SOCIETY or CHEMICAL 'oXynaphthalene-7-sulfonic. compounds coninstance betanaphthol', and by the purity of i following is-a fullycleai, andexact specifii cation.

v3.3-diaminodiarylmethanes in an alkaline 5'-oxynaphthalene-1.7 -disu1fonic'acid or such derivativesof 2-amino-5-0Xynaphthalene-7- .sulfonic acid which contain 'diazotizable amino groups in heteronuclearlateral' chains.

INDUSTRY IN'BASLE, 0F BASEL, S ITZERL N DYESTUZFFS APABLE QEBEING D IA ZOTIZ ED AND PROCESS-01F M KINesA iE.

speciiicatio no Letters Patent; V Patented J 1 1920; No Drawing. Applicatioiifiied necemb'er av, 1919. Serial-K03 128254. .7

To all-whom it may concern Be it: known that I, ARNoLD SoH'Ennnn, a citizen of the Swiss Republlc, and resident of Manchester, Great Blltalll. have nvented new Dyestufls Capable'of Being Dlazptlz'ed and Processes of Makmg Same, of whlch the and as 2-amino-5-0Nynaphthalene-7;sulfonic 5 0. compounds, can I also be employed,' for in- I stance thosefcorresponding to the following I formulas:-

SQ3H l \'NHCO I have found that valuable dyestuits able v a to be diazotized are obtained by combining one molecule of the tetrazoderivatives of medium with 2 molecules of =2-amin'o-5- taining a free, further diazotizable amino I group, as, for instance; the '2-amino-5- oxynaphthalene-7-sulfonic acid, the Q-aminoy These dyestuffs can be prepared bycoma j bim'ng 1 molecule of the tetrazoderivatiye with two molecules of the same 2-amino-5- oxynaphthalenefle sulfonic compound or with two difierent molecules ofthe' specified 2-amino-5'-oXynaphthalene-7-sulfonic compounds.- U

The new dyestufis constitute in a dry state 7 red-brown to dark-brown powders and dissolve in water with orange to blue-red colorations and in concentrated sulfuric acid with red to violet-blue [colorations They are further characterizedbythe extraordinary fastness of their dyeings diaz'otizedon the fiber and subsequently developed with a non-sulfonated developing compound, 'as for the thus obtained yellow-red to blue-violet tints. They can further be utilized as par ent materials for the manufacture of other dyestuffs. I According to the present invention can be employed as '3.3-diaminod iar lmethanes for instance the 3.3-diaminodiplienylmeth- 'ane, the 3.3-diamino-t.4-dimethyldiphenyl f methane, the '3.3"- diamino- 4=. 4.6.6' tetramethyldiphenylmethane, the ether of the 3.3-diamino-t.4=-dioxydiphenylmethane etc;

a soda fill H,' V a V A /xll' We a lowing example:

'lia'eam ple 212 kg. of .-diamino-4.4"- dimethyldiphenylmethane are diazotized with .60 kg. of hydrochloric acid of '30 per cent. and 13.8.

kg. of sodium nitrite of 100' per cent, at

' -'0 C. The solution of theresultingtetrazo.

derivative is pouredv into a solution of 72 kg,Vin-amino-benzoy1-2-amino-5-o naphsodium carbonate; The'dyestuif is isolated by boilingend adding common salt. Itcon- I stitut es a dark-red powder soluble in water to yellowred colorations and vin conceni tratedsulfuricacid to red solution. It dyes.

unmoivdanted cotton'red tints which become faster to washing and somewhat yellower on the; same withbetanaphthol. Y In this example can be. substituted for -the3.3"-fdiamino-4.4-di1nethy1dipheny1meth- 'anean equivalentouantityof any other 3.3

diaminodiarylmethane, while the m-amino- 2-amino-5oXynaphth-elenee7-sulfonic' comthd-obtsiined-With a certainnumber of dyestufis capable of being prepared according i. to the present invention. V

tha1ene-7-sulf0nic acid andof 6O of;

Gives a. dyestufi dyeing cot- V ton- The tetrazoderivative 01-- Combined with 7 After diazoti ing and de- Directlyvel 0p ment with betanaphthol- 3.3-Diaminodiphenylmethane; Yellow red. Yellow red.

Id. Red. Red.

Id v Orange. Violet.

In the following tabuler exhibit are shown the tints -:of the direct dyeings and of the 'diazotized dyeings developed with betanaph- The invention is illustrated by the to-1 f q y amino yi p e -F- S111- 1' 'fomc acid can be replaced by an equlvalent' I quantity of any other of the specified l l Gives a dyestu'fi dyeing cottonmanufacture of dyestuffs able to be diazotized, consisting in diazotizing the 3.3- 1 diamino--l.-dimethyldiphenylmethane and 15 combining one molecule of the resulting tetrazoderivative in an alkaline medium with two molecules of 2-amino-5-oxynaphthalene-7-sulfonic compounds containing a free further diazotizable amino group. 3. As new products the herein described dyestuffs able to be diazotized, derived from 3.3 -tetrazo diarylmethanes and 2 amino- 5 oxynaphthalene T -sulfonic compounds,

which constitute in a dry state red-brown to 'I he tetrazoderivative of- Combined with- Aft r diazotm ing and de- Directlyvelopment with betanaphthl- 3.3'-Diamino-1.4-dimethoxydiphenylmethane. 2molecu1es l 1 1y=r=c i 'N1I SOalI \N1I 2 OH "ens y 1? 1d. 2 molecules Red. Blue-violet.

soanc(w mn What I claim is: v I dark-brown powders, dissolve in water with 1. The herein described process for the orange'to blue red, and in concentrated suf- ,manufa -ture of dyestuffs able to be diazofuric acid with red to violet-blue coloratlons, .tized consisting in diazotizing a 3.3-d1am1- and dye cotton directly orange to blue-red 5 nmharylmethane and combining one moletints becoming fast to washing, when diazocule of the resulting tetrazoderivative in an tlzed on the fiber and subsequently developed alkaline medium with 2 molecules of 2-am1- with a non-sulfonated developing compound. no-5-oxynaphthalenefi-sulfomc compounds l. As new products the herein described containing a free further diazotlzable ammo dyestuffs able to be diazotized, derived group, from 3.3 tetrazo 4.4 dimethyldiphenyl- 2. The herein described process for the methane, and 2am1no-5-oxynaphthalene-7- sulfonic compounds, which constitute in a dry state red-brown to dark-brownpowders, dissolve in water with orange to blue-red,

and in concentrated sulfuric acid with red to violet-blue colorations and dye cotton directly orange to blue-red tints becoming extraordinarily fast to washing. when diazotized on the fiber and subsequently developed with a non-sulfonated developing compound.

In witness whereof I have hereunto signedmy name this 3rd day of December, 1919.

ARNOLD SOHEDLER. 

